1.创建数据库
DROP TABLE IF EXISTS `movie`;
CREATE TABLE `movie` (`id` int(255) NOT NULL AUTO_INCREMENT,`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,`author` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,`score` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,`title` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,PRIMARY KEY (`id`) USING BTREE
)
INSERT INTO `movie` VALUES (1, '美丽人生', '罗伯托·贝尼尼', '9.6', '一个快乐的传说');
INSERT INTO `movie` VALUES (2, '放牛班的春天', ' 克里斯托夫·巴拉蒂', '9.3', ' 歌声伴我心');
INSERT INTO `movie` VALUES (3, '触不可及', '奥利维埃·纳卡什 / 埃里克·托莱达诺', '9.3', '闪亮人生');
INSERT INTO `movie` VALUES (4, '三傻大闹宝莱坞', '拉吉库马尔·希拉尼', '9.2', ': 三个傻瓜');
INSERT INTO `movie` VALUES (5, '怦然心动', '罗伯·莱纳', '9.1', '梧桐树之恋');
INSERT INTO `movie` VALUES (6, '绿皮书', '彼得·法雷里', '8.9', ' 绿簿旅友');
INSERT INTO `movie` VALUES (7, '功夫', ' 周星驰', '8.8', '功夫3D');
INSERT INTO `movie` VALUES (8, '悲伤逆流成河', '郭敬明', '8.8', '逆流成河');
INSERT INTO `movie` VALUES (9, '肖申克的救赎', '弗兰克·德拉邦特', '9.8', '月黑高飞');
INSERT INTO `movie` VALUES (14, '霸王别姬', '陈凯歌', '9.6', '再见，我的妾');
INSERT INTO `movie` VALUES (15, '泰坦尼克号', ' 詹姆斯·卡梅隆', '9.4', '铁达尼号');
INSERT INTO `movie` VALUES (16, '这个杀手不太冷', '吕克·贝松', '9.4', '终极追杀令');
INSERT INTO `movie` VALUES (17, '千与千寻', '宫崎骏', '9.4', '神隐少女');
2.新建一个名为springboot-mybatisplus的springboot工程
3.配置yml
spring:datasource:url: jdbc:mysql:///你的数据库名?serverTimezone=UTCdriver-class-name: com.mysql.cj.jdbc.Driverusername: 你的数据库用户名password: 你的数据库密码
mybatis-plus:configuration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
4.导入依赖
<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.2</version></dependency>
5.创建分页插件
@Configuration
@EnableTransactionManagement
public class MPConfig {@Beanpublic MybatisPlusInterceptor mybatisPlusInterceptor(){MybatisPlusInterceptor mybatisPlusInterceptor=new MybatisPlusInterceptor();mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());return mybatisPlusInterceptor;}
}
6.创建实体类
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Movie {private Integer id;private String name;private String author;private String score;private String title;
}
7.创建数据层
@Mapper
public interface MovieMapper extends BaseMapper<Movie> {
}
8.创建服务接口类
public interface MovieService extends IService<Movie> {
}
9.创建服务接口实现类
@Service
public class MovieServiceImpl extends ServiceImpl<MovieMapper, Movie> implements MovieService {}
10.测试
@SpringBootTest
class SpringbootMybatisplusApplicationTests {@Autowiredprivate MovieService movieService;/*** 查询所有*/@Testpublic void testFindAll() {List<Movie> movieList = movieService.list();for (Movie movie : movieList) {System.out.println(movie);}}/*** 根据id查询*/@Testpublic void testFindById(){Movie movie = movieService.getById(17);System.out.println(movie);}/*** 新增*/@Testpublic void add(){Movie movie=new Movie();movie.setName("勇敢的心");movie.setAuthor("梅尔·吉布森");movie.setScore("9.5");movie.setTitle("惊世未了缘 ");boolean flag = movieService.save(movie);System.out.println(flag);}/*** 修改*/@Testpublic void testUpdateById(){Movie movie=new Movie();movie.setId(19);movie.setName("勇敢的心");movie.setAuthor("梅尔·吉布森");movie.setScore("9.4");movie.setTitle("惊世未了缘 ");boolean flag = movieService.updateById(movie);System.out.println(flag);}/*** 删除*/@Testpublic void testDelete(){boolean flag = movieService.removeById(19);System.out.println(flag);}/*** 分页查询*/@Testpublic void testPage(){Page<Movie> page=new Page<>(1,5);movieService.page(page,null);List<Movie> movieList = page.getRecords();for (Movie movie : movieList) {System.out.println(movie);}System.out.println("总条数为:"+page.getTotal());System.out.println("当前页为:"+page.getCurrent());System.out.println("当前页的条数为:"+page.getSize());System.out.println("总页数为:"+page.getPages());}/*** 条件查询*/@Testpublic void testQuery(){String name="美丽";QueryWrapper<Movie> queryWrapper=new QueryWrapper();queryWrapper.like("name",name);Map<String, Object> movieList = movieService.getMap(queryWrapper);System.out.println(movieList);}}
